Principles of Inheritance and Variation · Class 12 · CBSE · Science Biology
ABO blood grouping in humans is an example of which of the following genetic phenomena?
Practice question from Principles of Inheritance and Variation (Class 12 · CBSE · Science Biology), with the correct answer and a step-by-step solution.
easy · MCQ · Q-ACDCB8
ABO blood grouping in humans is an example of which of the following genetic phenomena?
- A.Multiple allelism and incomplete dominance
- B.Co-dominance and multiple allelismCorrect answer
- C.Polygenic inheritance and co-dominance
- D.Epistasis and multiple allelism
Solution
ABO blood groups are controlled by the gene I which has three alleles (, , and ), demonstrating multiple allelism. Furthermore, alleles and are co-dominant when present together, expressing both blood antigens A and B.
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